Hey everyone, I am planning on adding a transmission cooler soon to my FJ62 and I was thinking of adding a fluid control thermostat (like this one Derale 25719: Fluid Control Thermostat 1/2" NPT | JEGS ) after the radiator and before the aux cooler. This way the aux cooler only comes online once the fluid is hot enough and doesn't prolong the warm up time for the tranny. Has anyone else used one? Have opinions on good ones? There is a large range in prices for these things. Thank you!